Calculate text and file hashes locally with clear algorithm guidance.
Up to 20 MiB. The file never leaves your device.
Generate a digest for text or a file.
The file is buffered in browser memory before Web Crypto hashes it. Do not use plain SHA alone for password storage.
How to use it
The SHA-256 digest of the exact ASCII text abc begins ba7816bf and contains 64 hexadecimal characters.
Text is UTF-8 encoded exactly as entered: whitespace, case, and line endings matter, and empty text is valid. Files up to 20 MiB are buffered in browser memory before hashing. SHA digests can check integrity but plain SHA alone is not suitable for storing passwords; use a dedicated salted password-hashing scheme for that purpose.
FAQ
A cryptographic hash depends on every input byte. The tool intentionally does not trim, normalize, or change your text.
Practical guidance
A digest is a fixed-length fingerprint used for comparison; there is no key and no decrypt operation. Matching digests can support an integrity check, but they do not prove who created a file or protect its contents from being read.
Text mode hashes the exact UTF-8 bytes of what you type, including spaces and line endings. File mode hashes the selected file bytes without interpreting the format. Two visually similar inputs can therefore produce different digests.
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